Question

The 21st term of an A. P. whose first
two terms are - 3 and 4 is :
a) 17
b) 143
c) 137
d) – 143​

Answer 1

Answer:

(c)=137

Step-by-step explanation:

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Answer 2

Answer:

21st term of AP = 137

Step-by-step explanation:

a = -3

d = 4-(-3)

  = 4+3 = 7//

aₙ = a + (n-1)d

a₂₁ = -3 + (21-1)7

    = -3 + 140

     = 137//

21st term of AP = 137//

HOPE IT HELPS.

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