Question

in an AP a=4 d=-3
find a4​

Answer 1

$\huge \bold{ \underline{ \overline{\red{\mathfrak{AnSwer}}}}}$

• a = 4
• d = -3
• n = 4

we know that,

$\boxed{a_{n} = a + (n - 1)d }$

now,

$a_{4} = 4 + (4 - 1) - 3 \\ \\ \implies a_{4} = 4 + 3 \times - 3 \\ \\ \implies a_{4} = 4 - 9 \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \implies \boxed{a_{4} = - 5} \: \: \: \: \: \: \: \: \: \: \: \: \:$

so, a4 is -5

Answer 2

Answer:

Using formula of A. P

Give a = 4 , d = -3

tn= a + (n-1) * d

t4= 4 + ( 4-1 ) * -3

we take n =4 bez term is 4

= 4 + 3*-3

= 4 + (-9)

= 5

Not sure hope this helps you..........