Question

Find the 10 ith and 18 th term of AP : 14, 7, 10
Maths class 10th ​

Answer 1

Answer:

10th term = -49

18th term = -105

Step-by-step explanation:

a= t1 = 14 , d= t2-t1 = 7 - 14 = -7

t1 = 14 , t2 = 7 , t3 = 10

tn= a + (n-1) d

t10 = 14 + (10-1) -7

t10= 14 + 9 × (-7)

t10= 14 + (-63)

t10= 14-63

t10= -49

The 10th term of A.P is -49

tn = a+(n-1)d

t18 = 14+(18-1) -7

t18 = 14+17×(-7)

t18 = 14+(-119)

t18 = -105

The 18th term of an A.P is -105

Answer 2

Step-by-step explanation:

18th term is -105

10th term -49

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