in an ap given an = 4, d=2, 5n=-14 find n and a
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Let an = 4. (1)
d = 2. (2)
5n = -14. (3)
Find out:. n = ?
a = ?
5n = - 14
n = - 14÷5
Put the value of n in equ (1)
an = 4
a(-14÷5) = 4
a(-14) = 4×5
a(-14) = 20
a = 20 ÷ (-14)
a = 10 ÷ ( -7)
a = - 1.43
The value of a is -1.43 and the value of n is -14 ÷ 5.
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