hudashaikh225 hudashaikh225

15-09-2020
Mathematics

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if 18,a, b,-3 are in AP, then a+b is equal to

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jimrgrant1 jimrgrant1

15-09-2020

Answer:

a + b = 15

Step-by-step explanation:

The common difference d between consecutive terms is

d = a₂ - a₁ = a - 18

d = a₄ - a₃ = - 3 - b

Thus

a - 18 = - 3 - b ( add b to both sides )

a + b - 18 = - 3 ( add 18 to both sides )

a + b = 15

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