Question

answer pls!!!!!!!!!!!!!!!i need answer for 17 nd 18 ques with steps also

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Answer 1

Answer:

(17).

9/4 - [19/4 - {2 + (10/3 ÷ 5/3 × 5/4 - 4)]

9/4 - [19/4 - {2 + (2 × 5/4 - 4)]

9/4 - [19/4 - {2 + (5/2 - 4)]

9/4 - [19/4 - {2 - 3/4}]

9/4 - [19/4 - 3/4]

9/4 - 16/4

-7/4 Ans

(18).

1/1×2 + 1/2×3 + 1/3×4 + ...... + 1/12×13

(1/1 - 1/2) + (1/2 - 1/3) + (1/3 - 1/4) + ..... (1/12 - 1/13)

(1/1 - 1/13)

12/13 Ans

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Answer 2

Answer:

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