What tense is "has seen"? What tense is "had seen"?

Answer 1

"has seen" is present perfect tense.
"had seen" is past perfect tense.

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Answer 2

"Has seen" is in the present perfect tense. It is formed by using the auxiliary verb "has" (for third person singular) or "have" (for other persons) followed by the past participle of the verb "see."

"Had seen" is in the past perfect tense. It is formed by using the auxiliary verb "had" followed by the past participle of the verb "see."

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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